A beautiful winter day in LaHonda. December 22, 2018.

Road Bike

Glass Slipper
Shoe Sale

Mountain Bike

What's New?

Is it New Bike Time? Always!
04/03/19- Winter is OVER!!! It's been a long, slippery slog this year, but we're finally seeing light at the end of the tunnel. And great timing, since the TREKFest bicycle sale runs April 4th-15th! Don't waste another nice day on impulse power when you could be riding at Warp 9. Chain Reaction features the very best bikes from Trek & Electra, as well as the highest-quality travel bikes from Bike Friday. Road, Mountain, Hybrid, Electric assist, Kids... we've got them all. Probably the best selection in a single location you'll find anywhere on the peninsula too.
Got a bike that needs repairs?
We can handle that! If you purchased your bike from us, remember that you can bring it in anytime, without calling ahead, for minor on-the-spot adjustments of brakes, gears and wheels (at no charge; this is included with any bike purchased from us). For flat tires, again, no appointment needed. Where possible we try and do flat tires while you wait, but there will be times that's not possible. At most you will be leaving your bike overnight. For normal (bigger) repairs, calling ahead to schedule an appointment might make sense because the repair backlog at better shops sometimes goes from overnight to 5 days in the blink of an eye!
It's E-Bike time at Chain Reaction! E-Bikes are the latest thing; find out why! Commute to the office without needing a shower, bring home the groceries (even if you live on top of a hill!) or keep up with your obsessive-cyclist partner. Prices start at just $1299 (Oyama folding E-bike) up to the incredible Trek Super Commuter 8 at $5199.

Disc Brakes for Road Bikes- Making the right choice

Disc brakes are the latest thing for road bikes. But are they the right choice for you? We discuss the trade-offs including benefits, cost, added weight and maintenance requirements.

Just a few of the bikes we sell. One of them is just right for you!

Trek Dual Sport 1 Women's
$499.99 $539.99 7% Savings
Dual Sport 1 Women's is a hybrid bike in the true sense of the term: it exc...
Electra Loft 3i Step-Thru
$499.99 - $539.99 $539.99 Up To 7% Savings
Just enough gussy to get you up. The 3i is an all-weather, low-maintenance ...
Trek Domane AL 3 Women's
$949.99 $1,019.99 7% Savings
Domane AL 3 Women's is smooth, stable, and confidence-inspiring. It's perfe...
Trek Checkpoint AL 3
$1,149.99 $1,199.99 4% Savings
Checkpoint AL 3 may be the introductory gravel bike in the lineup, but it's...
Trek FX 2 Women's
$499.99 $539.99 7% Savings
Fitness, simplified FX offers a best-of-both-worlds combination of road ...
Electra Cruiser Lux 7D Step-Over
$449.99 - $469.99 $479.99 - $499.99 Up To 10% Savings
Lightweight aluminum modern cruiser with over twenty years of refinement bu...
Trek Roscoe 8
$1,469.99 $1,539.99 5% Savings
Roscoe 8 is a trail hardtail for anyone looking to have some serious fun ou...
Electra Townie Original 7D EQ Men's
$609.99 $649.99 6% Savings
You'll love gliding around town on Electra's Townie Original 7D. Comes with...
Trek FX Sport 4
$1,149.99 $1,149.99 - $1,199.99 4% Savings
FX Sport 4 is where performance fitness bikes begin. A lightweight frame, 2...
Trek Madone 9.2
$3,499.99 $5,999.99 42% Savings
Trek's Madone 9.2 strikes the ideal blend of aerodynamics, weight, technolo...
Trek Precaliber 12 Girl's
$199.99 $209.99 5% Savings
Key features - Better than big box bikes, and your kid deserves it - Fr...
Trek Marlin 5 23
$449.99 $489.99 8% Savings
Marlin takes its cue from light, fast XC bikes. The right wheel size for ea...